221221120120103 has 2 divisors, whose sum is σ = 221221120120104. Its totient is φ = 221221120120102.

The previous prime is 221221120120093. The next prime is 221221120120157. The reversal of 221221120120103 is 301021021122122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221120120103 - 2¹⁰ = 221221120119079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221120120193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610560060051 + 110610560060052.

It is an arithmetic number, because the mean of its divisors is an integer number (110610560060052).

Almost surely, 2^{221221120120103} is an apocalyptic number.

221221120120103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221120120103 is an equidigital number, since it uses as much as digits as its factorization.

221221120120103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221221120120103 its reverse (301021021122122), we get a palindrome (522242141242225).

The spelling of 221221120120103 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, one hundred three".